Effective Parameters on the Phase Morphology and Mechanical Properties of PP/PET/SEBS Ternary Polymer Blends

Authors

  • Hossein Riazi Department of polymer engineering and color technology, Amirkabir University of Technology, Tehran, Iran
  • Mohammad Ali Khoramabadi Department of Polymer Engineering, College of Polymer Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
  • Mohammad Mahdi Salehi Polymer and Science Technology Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
  • Omid Moini Jazani Department of Chemical Engineering, College of Engineering, University of Isfahan, Isfahan, Iran
Abstract:

In this work, ternary polymer blends based on polypropylene (PP)/ polyethylene terephthalate (PET) /poly(styrene-b (ethylene-co-butylene)-b-styrene) (SEBS) triblock copolymer and a reactive maleic anhydride grafted SEBS (SEBS-g-MAH) at various compositions were prepared by co-rotating twin screw extruder. The effects of PET, SEBS and SEBS-g-MAH compatibilizer on morphology of the blends were examined by scanning electron microscopy (SEM). The blends morphology was also estimated by some predicting methods, however, SEM results revealed some contrasts between results of predicting methods and the real morphology. Population of individual and core-shell particles as well as average diameter of the rubber-based cavities is extremely dependent on SEBS, SEBS-g-MA and PET content. Mechanical inspection tests showed that in comparison with the pure PP, addition of SEBS/SEBS-MA causes an increase in the impact strength of the system. Keeping other parameters constant, with increase in SEBS rubbery phase, the core-shell morphology was affected and the impact strength increased consequently. On the other hand, increase in PET content results in modulus increase and the impact strength decrease. Finally, the optimum processing conditions for compounding ternary PP/PET/SEBS blends were achieved.

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Journal title

volume 1  issue 1

pages  39- 48

publication date 2015-01-30

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